Squeeling and Jumping speedometer

The lube needs to be inside the sheath and especially where-ever there is a turn,kink,or lowspot.You can try, as a previous poster said, to pull the inner cable down and out the bottom and lube it that way. And it often works.If the racket comes back, I would disconnect the top and dribble some machine oil in there. I know guys frown on oil in there, but sometimes a guys gotta go with what is known to work. The oil tends to migrate out through the sheath where ever it may be cracked. And it collects dust there. The oil will work its way down to the low spot, where the water also collects/rusts. Its worked for me in tough cases.